Delegates are set to get vote on whether to force party to renationalise Royal Mail, after 2015 general election.

The CWU’s deputy general secretary Dave Ward told the Trades Union Congress that the union is tabling a renationalisation motion at the Labour conference.

The news comes as the Government is reported to be preparing to set out the timetable for the £3billion float of Royal Mail in the next few days.

Mr Ward said: “What about Labour – Ed Miliband is going to tell us we need a new relationship. I have been to sorting offices up and down the country. They are asking when are you going to get off your backside and stand up for public service workers like Royal Mail.

“We have got a Labour conference in a couple of weeks and we will put a motion down that calls upon Labour to renationalise this industry if they get back in power.”

“Privatisation is not in the interests of the public of this country, not in the interests of business and certainly not in the interests of the workforce. We say no Royal Mail for sale”.

TUC delegates voted unanimously in favour of a motion to support the Save Our Royal Mail campaign and for the TUC to back it.

The Government is ready to set out details of the timing of any privatisation this week, although this might be delayed by the threat of strike by the CWU workers.

A spokesman for the Department of Business, Innovation and Skills said: “A successful, financially sustainable Royal Mail with access to private capital is in the best interests of the workforce and all users of the universal service.

“The Government accepts that it will not be able to convince the CWU of the benefits of a sale but it believes that its reforms - including a sale of shares - will ensure that Royal Mail has a sustainable future.

“A viable and successful Royal Mail is in the best interests of employees. Through the sale we are also giving employees the opportunity to own a real stake in the business.”